A possible workaround I thought of—before support for opening PDF, TIFF, or any other file format within Tropy would be added—is that you could add the ability to create entries in the Tropy database for items of any file format. That way we could add our metadata to those files, so they could be put alongside all the JPEGs we currently have, and sort them, tag, take notes etc. But once we double click on the file reference in Tropy, it could open in an external program of our choosing, based on the file extension.
This occurred to me as a possible stopgap measure until other file formats could be read natively within Tropy. Mendeley functions this way for epub files, which can be added to our reference library, but open in an external program, unlike PDFs which open natively.
The ability to work and sort files of other formats is a feature that is becoming more urgent in my own work, simply because different periods and archives may have resources associated with them that are not in JPEG format.
Thanks and I would love to hear what others think about this.